KiK-NET and K-NET flatfile with automatically processed ground motions

Cite as:

Loviknes, Karina; von Specht, Sebastian; Lilienkamp, Henning; Händel, Annabel; Cotton, Fabrice (2025): KiK-NET and K-NET flatfile with automatically processed ground motions. GFZ Data Services. https://doi.org/10.5880/GFZ.LKUT.2025.001

Status

I N R E V I E W : Loviknes, Karina; von Specht, Sebastian; Lilienkamp, Henning; Händel, Annabel; Cotton, Fabrice (2025): KiK-NET and K-NET flatfile with automatically processed ground motions. GFZ Data Services. https://doi.org/10.5880/GFZ.LKUT.2025.001

Abstract

Ground-motion flatfiles are commonly used to develop ground motion models (GMMs) and for systematical analysis of ground motions over a wide range of distances and earthquake magnitudes. A flatfile is organized as a table of properties and various intensity measures of earthquake waveforms, including data processing parameters. Here we present a comprehensive processed ground-motion flatfile containing data from the Kyoshin (K-NET) and Kiban-Kyoshin (KiK-net) networks operated by National Research Institute for Earth Science and Disaster Resilience (NIED) (2019) in Japan (Okada et al., 2004; Aoi et al., 2011). This flatfile contains 914,628 ground motions from 18,018 events recorded by 1,749 stations. Out of these, 434,898 ground-motions are from KiK-net and 479,730 from K-net. The events were recorded between June 1996 and September 2024, covering distances up to 1200 km and magnitudes between 2.5 and 9. The ground motions have been automatically processed, and metadata describing each event and record are provided in the flat file.

An overview of the flatfiles and the processing steps to derive the reported ground-motion parameters is provided in this report. Further details and discussion about the flatfile compilation can be found in the corresponding publication: Loviknes, K., von Specht, S., Lilienkamp, H., Händel, A., and Cotton, F. (2025). Harmonized KiK-net and K-NET flatfile for systematic analysis of earthquake ground motions (submitted to Seismica, February 2025).

Authors

Loviknes, Karina;GFZ Helmholtz Centre for Geosciences, Potsdam, Germany
von Specht, Sebastian;GFZ Helmholtz Centre for Geosciences, Potsdam, Germany
Lilienkamp, Henning;GFZ Helmholtz Centre for Geosciences, Potsdam, Germany
Händel, Annabel;GFZ Helmholtz Centre for Geosciences, Potsdam, Germany
Cotton, Fabrice;GFZ Helmholtz Centre for Geosciences, Potsdam, Germany

Contact

Loviknes, Karina; GFZ Helmholtz Centre for Geosciences, Potsdam, Germany;

Keywords

Ground motions, Kyoshin, Automatic processing, geological process > seismic activity > earthquake, science > materials science > engineering > seismic engineering

GCMD Science Keywords

EARTH SCIENCE > HUMAN DIMENSIONS > NATURAL HAZARDS > EARTHQUAKES

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